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Sam Watson
1
Three-way Switch or How To Turn a Light On or Off From Either End of A Long Hallway Regardless Of The Position Of The Other Switch.
Lamp
Battery
Switch
6727
24 Dec 2014
2
A simple step-up transformer.
Transformer
Switch
Power Source
3969
18 Nov 2014
3
Full Wave Bridge prevents polarity mistake.
6217
20 Jul 2014
4
Sine Wave Oscillator
6716
16 Jul 2014
5
Using 'bucking' batteries: The voltage of the smaller battery is subtracted from the larger battery and the positive end of the smaller battery becomes the negative end of the two. This really works.
Lamp
Diode
Battery
4700
10 Jul 2014
6
Quick but unregulated split power supply.
Battery
3477
02 Jul 2014
7
Differentiator circuit
Op Amp
Power Source
Resistor
Capacitor
3479
28 Jun 2014
8
Sawtooth Wave Generator
4136
28 Jun 2014
9
Spike Generator
3253
24 Jun 2014
10
Triangle Wave Generator.
4927
22 Jun 2014
11
Square wave generator.
9793
20 Jun 2014
12
6 Volt Lamp Flasher
Lamp
Battery
Resistor
Capacitor
Transistor
4672
12 Jun 2014
1
2
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